Answer:
7.25
1.38
Step-by-step explanation:
a) For first addition
4.36 + 2.89
Start adding from the right side. Take the last number and add them together.
9+6 = 15.................. write 5 and keep 1
Bring forward the kept "1"
3+8 + 1 = 12............. write 2 and keep 1
Bring forward the kept "1"
4+2 + 1 = 7...............write 7
∴ 7.25
b) For second subtraction
6.8 - 5.42 = 1.38
Start from the right side of each number
0 - 2 requires that you borrow "1" from "8" now turning "0" to "10" and "8" to "7".
now, 10 - 2 = 8...........write 8
7 - 4 = 3.............write 3
6 - 5 = 1..............write 1
∴ 1.38
